The LV1150M is a virtual surround system Bi-CMOS IC for video soundtracks and audio. The main feature of this IC is the ability to create an audio ambience equivalent to that of a multichannel system by adding a signal to which virtual surround processing has been applied to the left and right channel input signals. It furthermore allows modification of this effect by the use of L+R and LR passive matrix processing and adjustment of the surround processing level with a level control.